1980. United States. Soil Conservation Service. "Base compiled from latest Oklahoma General Highway Map, Transverse Mercator Projection."; "Grid ticks based on Oklahoma State Plane Coordinate Sys... Dept. of Agriculture, Soil Conservation Service (Fort Worth, Tex.).
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1980. United States. Soil Conservation Service. "6-72 4-R-31905."; Includes vicinity map. 60 x 69 centimeters Scale approximately 1:126,720. Dept. of Agriculture, Soil Conservation Service (Fort Worth, Tex.).